James s



(No Model.)

J. S. BACK. ADJUSTMENT FOR DE-TAGHABLE NEGKS OP smmesn MUSICALINSTRUMENTS.

N 533,205, Patented Apr. 23, 1895.

NITED STATES JAMES S. BACK,

LEWIS ORME,

PATENT OFFICE...

ADJUSTMENT FOR DETACHABLE NECKS 0F STRlNGED MUSlCAL lNSl'RUMENTS.

SPECIFICATION forming part of Letters Patent No. 538,205, dated April23, 1895. Application filed November B, 1894. Serial No. 528 ,178- (Nomodel.)

To all whom it may concern.-

Be it known that 1, JAMES S. BACK, of the city of Ottawa, in theProvince of Ontario and Dominion of Canada, have invented certain newand usefulImprovements in Adj ustments for Detachable Necks of StringedMusical Instruments; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, forming a part thereof.

My invention, which will be hereinafter fully set forth and claimed,relates to stringed musical instruments.

The obj cot of my invention is a ready means of adjusting detachablenecks of guitars, banjos, mandolins and other stringed instruments of asimilar nature.

Figure 1 is an elevation of the neck end of the shell and the shell endof the neck of an instrument constructed according to my invention. Fig.2 is a rear view of the same. Fig. 3 is a longitudinal section of thesame through the center and showing shell and neck apart. Fig. 4 is anend elevation of the neck end showing the joint face. Fig. 5 is alongitudinal section through the part of the neck in which the adjustingscrew is inserted.

A is the shell of the instrument with the head block A and B is thedetachable neck with finger board B. The shell and neck are connected byan open joint, so that only the lower part, b, of the neck touches andabuts on the shell and a space, 2, is thus formed between the shell andneck end sufficient to admit the head of a capstan screw runlongitudinally in the neck at the upper part near the finger board. Thedepth of the neck end is made less than the depth of the shell, so thatthe back face of the neck end, I), will not be flush with the back a ofthe shell, but leave room on the shell for the attachment of the foot ofa plate, C, by screws, 0', passing into the head block A and which hasone end, 0, turned up at a right angle to fit against the back face I)of the neck. Said plate end 0 is provided with an eye, 0, adapted toengage the projecting end of a metallic pin, C, which is rigidly securedacross the grain of the wood in the neck end. Near the upper end of thejoint face, i. e., near the finger board, is socured in the head block Aa dowel pin, D, which projects and engages a dowel hole, l, v made inthe joint face of the neck. Said dowel pinD and dowel hole d and plate Cand 5 5 pin C connect shell and neck prevent ng lateral displacement andsecuring them n relative position to each other. In the oint face of theneck are secured two capstan screws, E, one near each edge and near thefinger board. 00 It is found that they may simply be threaded in thewood of the neck, but when this is somewhat soft, a special bush or nutof hard wood or metal maybe inserted, asshown in Fig. 5. The heads ofsaid screws abut against the end 6 5 of the shell, having the head blockA for a backing.

The strings of the instrument, not shown, prevent the upper part of thejoint from parting, as will be well understood, thus straining on theplate C and pin C while the capstan screws E act in opposition to thestrings. By turning the heads of these screws, any desired adjustmentmay be given to the neck with great facility.

I claim as my invention- 1. In a stringed musical instrument, thecombination with the shell, of a butt ended neck B, a shoulder Z)projecting from the rear end of the butt-face and adapted to abutagainst the neck end of the shell and prevent the other portion of theface from. touching said shell, a pin C secured in said neck near saidbutt-face and projecting at the back, the plate C secured to said shelland projecting 8 along the back face of said neck under and engagingsaid pin by an eye, a dowel pin D secured in said shell near the frontand adapted to engage a dowel hole in the neck, a dowel hole 01 in thebutt-face of the neck adapted to engage said dowel pin and two capstanscrews E threaded into the neck near each side and near the front andabutting with their capstan heads against the shell, substantially asset forth. 2. The butt-faced end of an interchangeable neck for stringedmusical instruments provided with an abutment against the shell at therear and with means of connecting the same to the shell at the rear incombination with two capstan screws threaded longitudinally in said necknear the front and near each side and so that the heads abut on said Ishell with their heads, and the strings oper- 1 butt face, substantiallyas set forth. ating in a direction opposite to that of the said 3. In astringed musical instrument, the screws, substantially as set forth.combination ofa neck having abutt-face with In testimony whereof I havesigned in the 5 projecting shoulder at the back bearing on presence ofthe undersigned witnesses.

the shell, means of holding the rear end of JAS. S. BACK. said face tothe shell, capstan screws E Vitnesses: threaded in said neck near thefront and near A. HARVEY,

each side and adapted to abut against the] A. TROWSSE.

